[0/3] spi: dw-mmio: add ACPI support

Message

Jay Fang Dec. 3, 2018, 3:15 a.m. UTC

Everyone:

This series adds ACPI support for the Designware SPI MMIO-based
controller. The Hisilicon Hip08 platform, that uses ACPI, has this
controller. However, the spi-dw-mmio driver only supports Device
Tree now.

ACPI also supports function names for GPIOs in a similar fashion to DT.
A example from ACPI which uses cs-gpios:

Device(SPI0) 
{
	Name(_HID, ...)
	
	Name (RBUF, ResourceTemplate ()  {
		GpioIo(Exclusive, PullUp, 0, 0, IoRestrictionNone, 
		"\\_SB.GPO1", 0, ResourceConsumer, , ) { 6 }
	})
  
	Method (_CRS, 0, NotSerialized) {
        	Return (RBUF)
    	}

	Name(_DSD, Package () {
		ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
            	Package () {
			Package () {"num-cs", 1},
			Package () {
				"cs-gpios", 
				Package () {
					^SPI0, 0, 0, 0,
				},
			},
            	}
    	})
}

[1] https://www.kernel.org/doc/Documentation/acpi/gpio-properties.txt

Thank you,
Jay

Jay Fang (3):
  ACPI / APD: Add clock frequency for Hisilicon Hip08 SPI controller
  spi: dw-mmio: add ACPI support
  spi: add ACPI support for SPI controller chip select lines(cs-gpios)

 drivers/acpi/acpi_apd.c   |  6 ++++++
 drivers/spi/spi-dw-mmio.c |  8 ++++++++
 drivers/spi/spi-dw.c      |  1 +
 drivers/spi/spi.c         | 32 ++++++++++++++++----------------
 4 files changed, 31 insertions(+), 16 deletions(-)